Today another user reports that: "deploy kylin on aliyun， web console net::ERR_CONTENT_DECODING_FAILED and when tomcat server.xml compress=on. so I disable compress ,then it's ok to use"
Please manually edit $KYLIN_HOME/tomcat/conf/server.xml, find the "compress=on", change it to off and try again. 2018-02-08 22:26 GMT+08:00 ShaoFeng Shi <shaofeng...@apache.org>: > It looks like the Chrome couldn't load some config data from Kylin > backend; the "*failed to load kylin.properties" is an error from > kylin's javascript. But the root cause wasn't printed.* > > *https://github.com/apache/kylin/blob/v2.2.0-release/webapp/app/js/services/kylinProperties.js#L29 > <https://github.com/apache/kylin/blob/v2.2.0-release/webapp/app/js/services/kylinProperties.js#L29>* > > *I'm not sure whether it is a bug of Kylin 2.2 for CDH; Or don't mind, > could you please download a previous version like Kylin 2.1 for CDH? Can be > found in:* > *https://archive.apache.org/dist/kylin/apache-kylin-2.1.0/ > <https://archive.apache.org/dist/kylin/apache-kylin-2.1.0/>* > > 2018-02-08 18:51 GMT+08:00 BELLIER Jean-luc <jean-luc.bellier@rte-france. > com>: > >> Hello Shaofeng, >> >> >> >> >> >> I checked again on Chrome but I can only do it via a remote desktop >> connection, as I am not administrator of my machine. I discovered this >> message : >> >> >> >> *Failed to load resource: net::ERR_CONTENT_DECODING_FAILED* >> >> *scripts.min.20171030211457.js:10159 failed to load >> kylin.properties[object Object]* >> >> *(anonymous) @ scripts.min.20171030211457.js:10159* >> >> *login:1 This page includes a password or credit card input in a >> non-secure context. A warning has been added to the URL bar. For more >> information, see https://goo.gl/zmWq3m <https://goo.gl/zmWq3m>.* >> >> *scripts.min.20171030211457.js:51857 num root branches = 0* >> >> *api/models Failed to load resource: net::ERR_CONTENT_DECODING_FAILED* >> >> >> >> May be this could give a clue on the problem. >> >> >> >> Could you please guide me in how to solve it ? >> >> >> >> Thank you in advance for your help. >> >> >> >> Best regards, >> >> Jean-Luc. >> >> >> >> *De :* BELLIER Jean-luc >> *Envoyé :* mercredi 7 février 2018 19:00 >> *À :* 'user@kylin.apache.org' <user@kylin.apache.org> >> *Objet :* RE: Problem starting Kylin Web interface >> >> >> >> Hello, >> >> >> >> I notice that I did not receive any answer for the following error that I >> get in the kylin.out file, and that is mentioned at the bottom of this mail >> : >> >> >> >> *SEVERE: The web application [/kylin] appears to have started a thread >> named [TGT Renewer for bellier...@hades.rte-france.com >> <bellier...@hades.rte-france.com>] but has failed to stop it. This is very >> likely to create a memory leak.* This one appears several times >> >> · *SEVERE: The web application [/kylin] created a ThreadLocal >> with key of type [java.lang.ThreadLocal] (value >> [java.lang.ThreadLocal@10cb8259]) and a value of type >> [org.apache.kylin.rest.msg.Message] (value >> [org.apache.kylin.rest.msg.Message@267ae210]) but failed to remove it when >> the web application was stopped. Threads are going to be renewed over time >> to try and avoid a probable memory leak. *This one appears several times >> >> >> >> Is there a way to solve this ? Could it be the cause of the problem ? You >> will find the result of the ‘jmap tomcat histo’ command in attachment. >> >> >> >> Thank your for your help. >> >> >> >> Best regards, >> >> Jean-Luc >> >> >> >> *De :* BELLIER Jean-luc >> *Envoyé :* mardi 6 février 2018 17:12 >> *À :* 'user@kylin.apache.org' <user@kylin.apache.org> >> *Objet :* RE: Problem starting Kylin Web interface >> >> >> >> May be the fact that I cannot load Hive tables is due to the indefinite >> load of the models. Is there a workaround to see if I can see the tables >> without loading the models ? >> >> >> >> Thank you again for your help. >> >> >> >> Best regards, >> >> Jean-Luc. >> >> >> >> *De :* BELLIER Jean-luc >> *Envoyé :* mardi 6 février 2018 16:34 >> *À :* user <user@kylin.apache.org> >> *Objet :* RE: Problem starting Kylin Web interface >> >> >> >> >> >> Hello , >> >> >> >> 1. I did the following (in this order) : >> >> >> >> · Stop the kylin process (kylin.sh stop) >> >> · Rename the kylin.log and kylin.out files in $KYLIN_HOME/logs >> >> · Checked the environment (check-env.sh) >> >> · Start the kylin process (kylin.sh start) >> >> >> >> So I get new kylin.out and kylin.log files. Apparentlty they seem to be >> OK. The version is the http://apache.mindstudios.com/ >> kylin/apache-kylin-2.2.0/apache-kylin-2.2.0-bin-cdh57.tar.gz. >> >> >> >> 2. I did another test : >> >> I cleaned everything, changed my version of Kylin ( >> http://mirror.ibcp.fr/pub/apache/kylin/apache-kylin-2.2.0/ >> apache-kylin-2.2.0-bin-hbase1x.tar.gz instead of >> http://apache.mindstudios.com/kylin/apache-kylin-2.2.0/apach >> e-kylin-2.2.0-bin-cdh57.tar.gz), put it in a separate directory and >> changed the value of $KYLIN_HOME. >> >> >> >> I got strange messages like this one : >> >> 2018-02-06 15:24:49,857 INFO [main] Configuration.deprecation:1175 : >> hadoop.native.lib is deprecated. Instead, use io.native.lib.available >> >> Exception in thread "main" java.lang.IllegalArgumentException: Failed to >> find metadata store by url: kylin_metadata@hbase >> >> at org.apache.kylin.common.persistence.ResourceStore.createReso >> urceStore(ResourceStore.java:89) >> >> at org.apache.kylin.common.persistence.ResourceStore.getStore( >> ResourceStore.java:101) >> >> at org.apache.kylin.common.persistence.ResourceTool.copy(Resour >> ceTool.java:165) >> >> at org.apache.kylin.common.persistence.ResourceTool.copy(Resour >> ceTool.java:196) >> >> at org.apache.kylin.common.persistence.ResourceTool.copy(Resour >> ceTool.java:190) >> >> at org.apache.kylin.common.persistence.ResourceTool.main(Resour >> ceTool.java:84) >> >> Caused by: java.lang.NoSuchMethodError: org.apache.hadoop.hbase.client >> .Get.setCheckExistenceOnly(Z)Lorg/apache/hadoop/hbase/client/Get; >> >> at org.apache.kylin.storage.hbase.HBaseResourceStore.internalGe >> tFromHTable(HBaseResourceStore.java:377) >> >> at org.apache.kylin.storage.hbase.HBaseResourceStore.getFromHTa >> ble(HBaseResourceStore.java:363) >> >> at org.apache.kylin.storage.hbase.HBaseResourceStore.existsImpl >> (HBaseResourceStore.java:116) >> >> at org.apache.kylin.common.persistence.ResourceStore.exists( >> ResourceStore.java:144) >> >> at org.apache.kylin.common.persistence.ResourceStore.createReso >> urceStore(ResourceStore.java:84) >> >> ... 5 more >> >> 2018-02-06 15:24:50,039 INFO [Thread-1] >> client.ConnectionManager$HConnectionImplementation:2259 >> : Closing master protocol: MasterService >> >> 2018-02-06 15:24:50,046 INFO [Thread-1] >> client.ConnectionManager$HConnectionImplementation:1830 >> : Closing zookeeper sessionid=0x36165799fcb08ad >> >> 2018-02-06 15:24:50,049 INFO [Thread-1] zookeeper.ZooKeeper:684 : >> Session: 0x36165799fcb08ad closed >> >> 2018-02-06 15:24:50,049 INFO [main-EventThread] zookeeper.ClientCnxn:512 >> : EventThread shut down >> >> >> >> However, I can create tables in HBase, so it is not a problem of rights. >> >> >> >> So I came back to my first version of Kylin. All the folders and bases >> are back to their state. In the Web interface, the models are still loading >> indefinitely, but I could not also see any Hive table, and cannot load >> them. >> >> Could there be the cause of the problem ? >> >> >> >> Thank you in advance for your help. >> >> >> >> Best regards, >> >> Jean-Luc. >> >> >> >> >> >> *De :* ShaoFeng Shi [mailto:shaofeng...@apache.org >> <shaofeng...@apache.org>] >> *Envoyé :* mardi 6 février 2018 13:30 >> >> *À :* user <user@kylin.apache.org> >> *Objet :* Re: Problem starting Kylin Web interface >> >> >> >> All looks good; Can't believe that it can not create the folder on HDFS. >> Please check more. >> >> >> >> 2018-02-06 18:58 GMT+08:00 BELLIER Jean-luc < >> jean-luc.bell...@rte-france.com>: >> >> Hello, >> >> >> >> In the /etc/hadoop/conf folder, I can see under the fs.defaultFS property >> the following value : hdfs://<cloudera-manager_name>:8020. The file >> indicates that the content was automatically generated by Cloudera Manager. >> Are there other points to check in this file ? >> >> >> >> According to the trace of $KYLIN_HOME/bin/find-hadoop-conf-dir.sh –v >> below : >> >> *kylin_hadoop_conf_dir is /etc/hadoop/conf* >> >> So I presume it is correct. The file called ‘yarn-site.xml’ is also in >> this folder. >> >> >> >> I hope this helps. >> >> >> >> Best regards, >> >> Jean-Luc. >> >> >> >> *De :* ShaoFeng Shi [mailto:shaofeng...@apache.org] >> *Envoyé :* mardi 6 février 2018 11:39 >> >> >> *À :* user <user@kylin.apache.org> >> *Objet :* Re: Problem starting Kylin Web interface >> >> >> >> Kylin has located the Hadoop config folder as "/etc/hadoop/conf", is >> this the right location? Please check whether the core-site.xml under this >> folder has the proper configuration, for example, 'fs.defaultFS' points to >> the HDFS. >> >> >> >> 2018-02-06 16:58 GMT+08:00 BELLIER Jean-luc < >> jean-luc.bell...@rte-france.com>: >> >> Hello, >> >> >> >> I have cleaned all then environments (HBase, Hive) and restarted the >> sample.sh script again. In the output messages, I can see several times the >> following : >> >> >> >> 2018-02-06 09:43:21,034 INFO [main] util.ZookeeperDistributedLock:154 *: >> 4...@node2.hades.rte-france.com <4...@node2.hades.rte-france.com> acquired >> lock at /kylin/kylin_metadata/create_htable/kylin_metadata/lock* >> >> 2018-02-06 09:43:21,050 DEBUG [main] hbase.HBaseConnection:309 : Creating >> HTable 'kylin_metadata' >> >> 2018-02-06 09:43:21,083 INFO [main] Configuration.deprecation:1175 : >> hadoop.native.lib is deprecated. Instead, use io.native.lib.available >> >> >> >> However, my HBase table (‘kylin_metadata’) is created and contains 20 >> rows. I suppose it is correct. >> >> >> >> I have a question : in the KYLIN Interface, where are the models loaded >> from ? I could help to understand the problem. >> >> >> >> Thank you again for your help. Have a good ay. >> >> >> >> Best regards, >> >> Jean-Luc. >> >> >> >> >> >> *De :* BELLIER Jean-luc >> *Envoyé :* mardi 6 février 2018 09:12 >> *À :* user <user@kylin.apache.org> >> *Objet :* RE: Problem starting Kylin Web interface >> >> >> >> Hello, >> >> >> >> I thank you for your feedback and the information about the >> kylin.properties file, which gives lots of information. >> >> >> >> To answer your question, here is the result of the >> ./bin/find-hadoop-conf-dir.sh –v command >> >> >> >> bellierjlu@node2:~$ $KYLIN_HOME/bin/find-hadoop-conf-dir.sh -v >> >> Turn on verbose mode. >> >> Retrieving hadoop conf dir... >> >> */opt/cloudera/parcels/CDH-5.12.0-1.cdh5.12.0.p0.29/lib/hbase/bin/../conf >> is not valid hadoop dir conf because yarn-site.xml is missing* >> >> */opt/cloudera/parcels/CDH-5.12.0-1.cdh5.12.0.p0.29/lib/hbase/bin/.. is >> not valid hadoop dir conf because yarn-site.xml is missing* >> >> *kylin_hadoop_conf_dir is /etc/hadoop/conf* >> >> bellierjlu@node2:~$ >> >> >> >> Could this be the cause of the problem ? >> >> >> >> Thank you in advance for your help. >> >> >> >> Best regards, >> >> Jean-Luc. >> >> >> >> *De :* ShaoFeng Shi [mailto:shaofeng...@apache.org >> <shaofeng...@apache.org>] >> *Envoyé :* mardi 6 février 2018 01:45 >> >> *À :* user <user@kylin.apache.org> >> *Objet :* Re: Problem starting Kylin Web interface >> >> >> >> Hi Jean-Luc, >> >> >> >> Kylin's metadata is persisted in HBase, the metadata table is >> "kylin_metadata" by default, which is also configurable in >> conf/kylin.properties with key *kylin.metadata.url*; >> >> The HDFS path '/kylin/kylin_metadata' is for the cube and other files; >> Before you build the first cube, the folder is empty I think. >> >> >> >> If sample.sh couldn't create the /tmp/kylin folder on HDFS; If the folder >> wasn't create, Kylin might not find the Hadoop config properly. You can run: >> >> >> >> ./bin/find-hadoop-conf-dir.sh -v >> >> >> >> to see what it prints. >> >> >> >> >> >> >> >> >> >> 2018-02-05 23:24 GMT+08:00 BELLIER Jean-luc < >> jean-luc.bell...@rte-france.com>: >> >> Hello, >> >> >> >> I am sorry to come back again to you, but I am really stuck. I restarted >> all the services and agents on my Cloudera cluster, so it is OK now. >> >> I noticed that some HDFS directories were empty, especially /tmp/kylin. >> When I have a look on the code of sample.sh, I can see that this script >> should create sthe subfolder /tmp/kylin/sample_cube/data. These data are >> used to create the Hive tables and are removed after the creation of these >> tables. Let call the node N1 >> >> >> >> I have another machine on which Kylin is installed and I succeeded in >> launching sample.sh. On this machine, I can see a HDFS folder called >> /kylin/kylin_metadata with, I presume, the metadata of the cube stored in >> it. >> >> >> >> I cannot succeed in creating this folder on N1. I removed the /tmp/kylin >> folder, the hbase table and the Hive tables. >> >> I really do not know what to do to restart the creation of the project >> from scratch. >> >> I also checked the HDFS space using the command ‘hdfs dfs –df’ and it >> tells me a usage of 2%. >> >> >> >> Could you please guide me in how to achieve it. There may be something I >> did wrong, but I really do not what. Is my way of doing correct ? Are >> there other files to remove (temporary files, for example), and in this >> case, where are they located ? >> >> >> >> Any help would be greatly appreciated. >> >> >> >> Thank you in advance for your help. Have a good day. >> >> >> >> Best regards, >> >> Jean-Luc. >> >> >> >> *De :* BELLIER Jean-luc >> *Envoyé :* vendredi 2 février 2018 18:54 >> *À :* user <user@kylin.apache.org> >> *Objet :* RE: Problem starting Kylin Web interface >> >> >> >> Hello, >> >> >> >> Thanks for the suggestion. I tried on another machine with Firefox and >> Chrome, but I get the same result as before. I also rebuilt the project >> ‘sample’ from scratch, with no change. >> >> My cluster seems to have problems on its nodes, especially memory which >> is nearly full on most nodes. >> >> I suspect this could be one of the cause of the problem : no available >> memory and swap space also nearly full. >> >> >> >> What do you think of this assumption ? >> >> >> >> I will see that with my Cloudera manager next week, as I am not a >> specialist at all. >> >> >> >> Have a good week-end. >> >> >> >> Best regards, >> >> Jean-Luc. >> >> >> >> >> >> *De :* ShaoFeng Shi [mailto:shaofeng...@apache.org >> <shaofeng...@apache.org>] >> *Envoyé :* vendredi 2 février 2018 14:59 >> >> >> *À :* user <user@kylin.apache.org> >> *Objet :* Re: Problem starting Kylin Web interface >> >> >> >> Please try Chrome; Most developers are using Chrome; And if there is an >> error, you can press F12 to check the HTTP request/response, there should >> be more information. >> >> >> >> 2018-02-02 21:54 GMT+08:00 BELLIER Jean-luc < >> jean-luc.bell...@rte-france.com>: >> >> Hello again, >> >> >> >> I forgot to mention that I use IE or Secured Firefox as Web browsers. I >> have the same issue with both. Could there be the cause of the problem ? >> >> >> >> Best regards >> >> Jean-Luc. >> >> >> >> *De :* BELLIER Jean-luc >> *Envoyé :* vendredi 2 février 2018 14:48 >> *À :* user <user@kylin.apache.org> >> *Objet :* RE: Problem starting Kylin Web interface >> >> >> >> Hello >> >> >> >> Thank you for your answer. >> >> I did the following : >> >> · rename my current kylin.log and kylin.out files to keep a >> trace >> >> · restarted the commands ‘kylin.sh start’ and ‘sample.sh’ >> >> I cannot see anything special in the new .log or .out files. The Hive >> tables exist, and the kylin_metadata also. I can scan it through Hbase >> shell command. It gives me 44 rows. >> >> >> >> However, the problem is still the same with the Kylin Interface : Models >> loading indefinitely, no table displayed, and nothing in the ‘System’ >> section. When I try to refresh the server config and the server >> environement, I still have the message ‘Oops ! Failed to take action. I >> also have this message as soon as I click to the ‘System’ button. >> >> >> >> Should I rebuild the project from scratch to be sure that everything is >> correctly created, or should I investigate somewhere else (services, node >> states, …) ? >> >> >> >> I send in attachement the now kylin.log and kylin.out files >> >> Thank you in advance for your help. Have a good day. >> >> >> >> Best regards, >> >> Jean-Luc. >> >> >> >> *De :* ShaoFeng Shi [mailto:shaofeng...@apache.org >> <shaofeng...@apache.org>] >> *Envoyé :* vendredi 2 février 2018 12:06 >> *À :* user <user@kylin.apache.org> >> *Objet :* Re: Problem starting Kylin Web interface >> >> >> >> Hi Jean-luc, >> >> >> >> The kylin.log seems okay, the service is started and the job scheduler is >> running up. >> >> >> >> The kylin.out has some error about missing ".keystore", but by default if >> you accessing kylin via http, it shouldn't need to load keystore. Please >> try visit http://host:7070/kylin again to see whether there is any issue >> in the web console. >> >> >> >> 2018-02-01 23:17 GMT+08:00 BELLIER Jean-luc < >> jean-luc.bell...@rte-france.com>: >> >> Hello, >> >> >> >> I am new in Kylin. I would like to test it for a POC for my company. I >> opened a ticket yesterday in the issues mail box through Jira, but I am not >> sure it is the best place. >> >> Here is the reference of the ticket : https://issues.apache.org/jira >> /browse/KYLIN-3218 >> >> >> >> I am using the version apache-kylin-2.2.0-bin-cdh57, with Linux. I >> installed the software on a client node. I successfully started the process >> and created the cube given in the example project. >> >> Apparently, no mistake appears when starting the kylin.sh shell or >> generating the cube using sample.sh. >> >> >> >> When I launch the web interface using <nodename>:7070/kylin, I cannot >> load the models (the cursor is turning indefinitely). >> >> By looking at the kylin.out log, I could see that the process could not >> find the $KYLIN_HOME/tomcat/conf/.keystore file. So I created it >> manually, and relaunched the cube generation and the ‘kylin.sh start’ >> command. >> >> Now I face to other mistakes : >> >> >> >> · *Exception in thread "Thread-14" java.lang.RuntimeException: >> Error while peeking at >> /kylin/kylin_metadata/job_engine/global_job_engine_lock* >> >> · *SEVERE: The web application [/kylin] appears to have started >> a thread named [TGT Renewer for bellier...@hades.rte-france.com >> <bellier...@hades.rte-france.com>] but has failed to stop it. This is very >> likely to create a memory leak.* This one appears several times >> >> · *SEVERE: The web application [/kylin] created a ThreadLocal >> with key of type [java.lang.ThreadLocal] (value >> [java.lang.ThreadLocal@10cb8259]) and a value of type >> [org.apache.kylin.rest.msg.Message] (value >> [org.apache.kylin.rest.msg.Message@267ae210]) but failed to remove it when >> the web application was stopped. Threads are going to be renewed over time >> to try and avoid a probable memory leak. *This one appears several times >> >> >> >> Apparently, something else is missing, or I did something wrong, but I do >> not know what. I would also like to know what will be the impact of the two >> ‘SEVERE’ issues above and how I could correct it. >> >> >> >> I attach the last version of kylin.out file. Any help would be kindly >> appreciated. >> >> >> >> Thank you in advance for your help. Have a good day. >> >> >> >> Best regards. >> >> Jean-Luc. >> >> >> >> >> >> "Ce message est destiné exclusivement aux personnes ou entités auxquelles >> il est adressé et peut contenir des informations privilégiées ou >> confidentielles. Si vous avez reçu ce document par erreur, merci de nous >> l'indiquer par retour, de ne pas le transmettre et de procéder à sa >> destruction. >> >> This message is solely intended for the use of the individual or entity >> to which it is addressed and may contain information that is privileged or >> confidential. If you have received this communication by error, please >> notify us immediately by electronic mail, do not disclose it and delete the >> original message." >> >> >> >> >> >> -- >> >> Best regards, >> >> >> >> Shaofeng Shi 史少锋 >> >> >> >> >> >> "Ce message est destiné exclusivement aux personnes ou entités auxquelles >> il est adressé et peut contenir des informations privilégiées ou >> confidentielles. Si vous avez reçu ce document par erreur, merci de nous >> l'indiquer par retour, de ne pas le transmettre et de procéder à sa >> destruction. >> >> This message is solely intended for the use of the individual or entity >> to which it is addressed and may contain information that is privileged or >> confidential. If you have received this communication by error, please >> notify us immediately by electronic mail, do not disclose it and delete the >> original message." >> >> >> >> >> >> -- >> >> Best regards, >> >> >> >> Shaofeng Shi 史少锋 >> >> >> >> >> >> "Ce message est destiné exclusivement aux personnes ou entités auxquelles >> il est adressé et peut contenir des informations privilégiées ou >> confidentielles. Si vous avez reçu ce document par erreur, merci de nous >> l'indiquer par retour, de ne pas le transmettre et de procéder à sa >> destruction. >> >> This message is solely intended for the use of the individual or entity >> to which it is addressed and may contain information that is privileged or >> confidential. If you have received this communication by error, please >> notify us immediately by electronic mail, do not disclose it and delete the >> original message." >> >> >> >> >> >> -- >> >> Best regards, >> >> >> >> Shaofeng Shi 史少锋 >> >> >> >> >> >> "Ce message est destiné exclusivement aux personnes ou entités auxquelles >> il est adressé et peut contenir des informations privilégiées ou >> confidentielles. Si vous avez reçu ce document par erreur, merci de nous >> l'indiquer par retour, de ne pas le transmettre et de procéder à sa >> destruction. >> >> This message is solely intended for the use of the individual or entity >> to which it is addressed and may contain information that is privileged or >> confidential. If you have received this communication by error, please >> notify us immediately by electronic mail, do not disclose it and delete the >> original message." >> >> >> >> >> >> -- >> >> Best regards, >> >> >> >> Shaofeng Shi 史少锋 >> >> >> >> >> >> "Ce message est destiné exclusivement aux personnes ou entités auxquelles >> il est adressé et peut contenir des informations privilégiées ou >> confidentielles. Si vous avez reçu ce document par erreur, merci de nous >> l'indiquer par retour, de ne pas le transmettre et de procéder à sa >> destruction. >> >> This message is solely intended for the use of the individual or entity >> to which it is addressed and may contain information that is privileged or >> confidential. If you have received this communication by error, please >> notify us immediately by electronic mail, do not disclose it and delete the >> original message." >> >> >> >> >> >> -- >> >> Best regards, >> >> >> >> Shaofeng Shi 史少锋 >> >> >> >> >> "Ce message est destiné exclusivement aux personnes ou entités auxquelles >> il est adressé et peut contenir des informations privilégiées ou >> confidentielles. Si vous avez reçu ce document par erreur, merci de nous >> l'indiquer par retour, de ne pas le transmettre et de procéder à sa >> destruction. >> >> This message is solely intended for the use of the individual or entity >> to which it is addressed and may contain information that is privileged or >> confidential. If you have received this communication by error, please >> notify us immediately by electronic mail, do not disclose it and delete the >> original message." >> > > > > -- > Best regards, > > Shaofeng Shi 史少锋 > > -- Best regards, Shaofeng Shi 史少锋
